Abstract
A high-temperature self-lubricating composite NiAl-Cr-Mo-CaF 2 was fabricated using the powder metallurgy technique, and the tribological behavior of the composite at a wide range of temperatures (room temperature to 1000 °C) was investigated. The results showed that the composite had a favorable friction coefficient of about 0.2 and an excellent wear resistance of about 1 9 10 -5 mm 3N -1m -1 at the high temperatures tested (800 and 1000 °C). The excellent self-lubricating performance was attributed to the formation of the glaze film on the worn surface consisting mainly of CaCrO 4 and CaMoO 4 as high-temperature solid lubricants.
Original language | English |
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Pages (from-to) | 535-540 |
Number of pages | 6 |
Journal | Tribology Letters |
Volume | 41 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2011 |
Externally published | Yes |
Keywords
- High temperature
- NiAl matrix
- Self-lubricating composite
- Wear